Machine for folding paper



.July 8, 1930. v o. KLEINSCHMIT" 1,770,312

MACHINE FOR FOLDING PAPER Filed Aug. 15, 1929 2 Sheets-Sheet 1 Fig.1.

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' y 8, 1930- o. KLEINSCHMIT 1,770,312

MACHINE FOR FOLDING PAPER Filed Aug. 15, 1929 2 Sheets-Sheet 2 Patented July 8, 1930 UNITED STATES PATENT- OFFICE.

BREHMER, MASGHINENFAIBRIK, OF LEIPZIG-PLAGW'I'IZ, GERMANY MACHINE FOR FOLDING PAPER Application filed August 15, 1929, Serial No.

This invention relates to machines for folding paper and particularly sheets of paper to be employed'for example for bookbinding and the like purposes. In such machines where pairs of associated and' co-operating folding rolls are employed it is common practice, in order to allow for variation in the thickness of the paper, to allow one roll of a pair to yield relatively to the other and this is usually effected by mounting one of the rolls in slidable bearings controlled by springs. Where parallel folds or creases are to be formed in sheets of paper and particularly in machines where for this purpose each sheet is either fed directly to the folding rolls, or is caused to travel for buckle folding between buckling plates until it is checked by an adjustable stop and thereby is buckled between the associated folding rolls which produce a fold therein at a pre determined point, it has hitherto been usual owing to the roll bearings being capable of movement only in one direction toso arrange the rolls that a fixed roll and what may be termed a yielding roll, that is a roll mounted in slidable bearings, are disposed alternately and it has even been proposed to make.

all the rolls yieldable, an arrangement which must obviously result in a material increase in manufacturing costs.

According to the present invention one roll of every pair of associated or co-operating folding rolls is yieldable in two divergent directions. The slidable bearings of each of these yieldable rolls are moreover submitted to the action of a spring which is adapted to maintain each yieldable roll in its correct position relatively to its co-operating nonyieldable or stationary roll. This arrangement not only permits the yieldable roll to co-operate with stationary rolls either disposed above or below or in the same horizontal plane as the yieldable roll but also.

materially simplifies the construction of the folding machine with consequent reduction of cost and easier manipulation. Furthermore the rolls may be arranged in any convenient order to suit the purpose in view.

In order thatthe nature of the invention may be readily understood and carried into 386,016, and in Germany November 9, 1927.

practical effect an arrangement in accordance therewith is illustrated diagrammatically in the accompanying drawings applied by way of example to the well known bucklefolding machine; similar reference characters denoting like parts in all the figures Figure 1 being a sectional elevation,

Figure 2 is a front view and Figure 3 is a plan of a buckle folding machine with the invention applied thereto.

Figures 4 and 5 are views to a larger scale to illustrate the arrangement of the folding rolls, Figure 4 showing a horizontal feed of the sheet'as in Figure l and Figure 5 an altar-native arrangement with an inclined The machine diagrammatically illustrated being of a type well known to those skilled in the art the same need not be described in detail but its main features will be briefly indicated. 1

a and I) represent the side frames that carry the main shaft a, driven by the belt pulley d, by which through the intermediate gear wheels 6 the requisite rotation is imparted to the folding rolls 1, 2, 3 etc. hereinafter more particularly referred to, f represents the laying-on table, 9 the fly and h the delivery table.

The sheet :1: to be folded is fed from the laying-on table 7 and passes between the rolls 1 and 2 by which it is caused to travel between the spaced grids or buckling plates 71 in which it strikes an adjustable stop and thereby is buckled between the rolls 2 and 3 which seize the sheet, form the fold therein and guide it to the buckling plates k. This operation which is well known is then repeated causing the second parallel fold to be formed by the rolls 3 and 4 from whence the sheet travels between the buckling plates at and a third parallel fold is formed by the rolls 4 and 5 and so on. From the rolls shown the sheet may be conveyed to further rolls the axes of which may be disposed at right angles to the 'axis of the rolls 1, 2, 3 etc. and where additional folding may be performed or the folded sheet may be collected in the usual way.

It will be seen from the drawings which illustrate a five-fold machine that only the three rolls, 2, 4: and 6 need be mounted in slidable bearings as they are capable of yielding in the two divergent directions of the ar rows 31 and 2 either consecutively or simultaneously when they are pressedapart by the sheet passing therethrough according to the particular non-yielding or stationary roll with which each of the yieldin rolls m co-operates. This will be clear on re erence to either Figure 4 or Figure 5. The bearing n for example of the roll 2 when the said roll yields in the direction of the arrow 3/ will slide in the same direction along its bed 0 and move away from its bed 1) and when on the other hand the roll 2 yields in the direction of the arrow 2 the bearing 11, will slide in the direction of the arrow 2 along its bed p and move away from its bed 0. A spring 1* bearing against the face of each of the roll bearings tends to always press the same back to its initial position. The tension of the springs 1" may be adjusted according to the thickness of the paper passing through the machine.

By the arrangement described the mounting of all the folding rolls is simplified and the yielding rolls 2, 4 and 6 can be readily forced back or entirely withdrawn when an necessary as for example to enable entangled sheets to be put straight or withdrawn.

What I claim is In a paper folding machine, spaced fixed folding rolls, counter pressure rolls offset from and disposed opposite to the spaces between the fixed rolls, and resilient means for normally urging the pressure rolls toward the adjacent fixed rolls and yieldable in all directions therefrom to accommodate the folds of paper passing through the machine.

OSCAR KLEINSCHMIT. 

